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CC-3625: "Now Playing->delete the current playing items" will stop output of pypo-liquidsoap 

-fixed
This commit is contained in:
Martin Konecny 2012-04-12 17:09:54 -04:00
parent c2db20f004
commit a594569ddc
1 changed files with 38 additions and 23 deletions
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61
python_apps/pypo/pypopush.py
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@ -51,6 +51,12 @@ class PypoPush(Thread):
self.logger = logging.getLogger('push')
def is_media(self, item):
return item["type"] == "file"
def is_event(self, item):
return item["type"] == "event"
def main(self):
loops = 0
@ -70,17 +76,17 @@ class PypoPush(Thread):
#We get to the following lines only if a schedule was received.
liquidsoap_queue_approx = self.get_queue_items_from_liquidsoap()
chains = self.get_all_chains(media_schedule)
current_chain = self.get_current_chain(chains)
if len(current_chain) > 0 and len(liquidsoap_queue_approx) == 0:
current_event_chain = self.get_current_chain(chains)
if len(current_event_chain) > 0 and len(liquidsoap_queue_approx) == 0:
#Something is scheduled but Liquidsoap is not playing anything!
#Need to schedule it immediately..this might happen if Liquidsoap crashed.
self.modify_cue_point_of_first_link(current_chain)
next_media_item_chain = current_chain
self.modify_cue_point_of_first_link(current_event_chain)
next_media_item_chain = current_event_chain
time_until_next_play = 0
else:
self.handle_new_media_schedule(media_schedule, liquidsoap_queue_approx, current_chain)
media_chain = filter(self.is_media, current_event_chain)
self.handle_new_media_schedule(media_schedule, liquidsoap_queue_approx, media_chain)
chains = self.get_all_chains(media_schedule)
next_media_item_chain = self.get_next_schedule_chain(chains)
self.logger.debug("Next schedule chain: %s", next_media_item_chain)
@ -155,7 +161,7 @@ class PypoPush(Thread):
return liquidsoap_queue_approx
def handle_new_media_schedule(self, media_schedule, liquidsoap_queue_approx, current_chain):
def handle_new_media_schedule(self, media_schedule, liquidsoap_queue_approx, media_chain):
"""
This function's purpose is to gracefully handle situations where
Liquidsoap already has a track in its queue, but the schedule
@ -164,24 +170,35 @@ class PypoPush(Thread):
queue.
"""
problem_at_iteration = self.find_removed_items(media_schedule, liquidsoap_queue_approx)
problem_at_iteration, problem_start_time = self.find_removed_items(media_schedule, liquidsoap_queue_approx)
if problem_at_iteration is None and len(current_chain) > len(liquidsoap_queue_approx):
if problem_at_iteration is not None:
#Items that are in Liquidsoap's queue aren't scheduled anymore. We need to connect
#and remove these items.
self.logger.debug("Change in link %s of current chain", problem_at_iteration)
self.remove_from_liquidsoap_queue(problem_at_iteration, liquidsoap_queue_approx)
if problem_at_iteration is None and len(media_chain) > len(liquidsoap_queue_approx):
self.logger.debug("New schedule has longer current chain.")
problem_at_iteration = len(liquidsoap_queue_approx)
if problem_at_iteration is not None:
self.logger.debug("Change in chain at link %s", problem_at_iteration)
self.modify_cue_point_of_first_link(current_chain)
self.push_to_liquidsoap(current_chain[problem_at_iteration:])
#self.modify_cue_point_of_first_link(media_chain)
self.push_to_liquidsoap(media_chain[problem_at_iteration:])
"""
Compare whats in the liquidsoap_queue to the new schedule we just
received in media_schedule. This function only iterates over liquidsoap_queue_approx
and finds if every item in that list is still scheduled in "media_schedule". It doesn't
take care of the case where media_schedule has more items than liquidsoap_queue_approx
"""
def find_removed_items(self, media_schedule, liquidsoap_queue_approx):
#iterate through the items we got from the liquidsoap queue and
#see if they are the same as the newly received schedule
iteration = 0
problem_at_iteration = None
problem_start_time = None
for queue_item in liquidsoap_queue_approx:
if queue_item['start'] in media_schedule.keys():
media_item = media_schedule[queue_item['start']]
@ -191,29 +208,27 @@ class PypoPush(Thread):
pass
else:
problem_at_iteration = iteration
problem_start_time = queue_item['start']
break
else:
#A different item has been scheduled at the same time! Need to remove
#all tracks from the Liquidsoap queue starting at this point, and re-add
#them.
problem_at_iteration = iteration
problem_start_time = queue_item['start']
break
else:
#There are no more items scheduled for this time! The user has shortened
#the playlist, so we simply need to remove tracks from the queue.
problem_at_iteration = iteration
problem_start_time = queue_item['start']
break
iteration+=1
if problem_at_iteration is not None:
#The first item in the Liquidsoap queue (the one that is currently playing)
#has changed or been removed from the schedule. We need to clear the entire
#queue, and push the new schedule
self.logger.debug("Change in link %s of current chain", problem_at_iteration)
self.remove_from_liquidsoap_queue(problem_at_iteration, liquidsoap_queue_approx)
return problem_at_iteration
return (problem_at_iteration, problem_start_time)
@ -277,7 +292,7 @@ class PypoPush(Thread):
current_chain = chain[iteration:]
break
iteration += 1
return current_chain
"""
@ -305,10 +320,10 @@ class PypoPush(Thread):
def date_interval_to_seconds(self, interval):
return (interval.microseconds + (interval.seconds + interval.days * 24 * 3600) * 10**6) / 10**6
def push_to_liquidsoap(self, media_item_chain):
def push_to_liquidsoap(self, event_chain):
try:
for media_item in media_item_chain:
for media_item in event_chain:
if media_item['type'] == "file":
self.telnet_to_liquidsoap(media_item)
elif media_item['type'] == "event":